And as I stand there in shock, my heart pounding in my chest, I feel a surge of adrenaline coursing through my veins. Without thinking, I reach for the knife nestled in my pocket and plunge it into him, over and over again, until I am sure he is no longer a threat. Then, without looking back, I turn and flee into the night, my mind racing with fear and the knowledge that I may never be able to outrun the guilt that now consumes me.